About the grin tag
grin is a face tag that NovelAI Diffusion can use. On Danbooru it has 233,048 posts, and its best-rated still image scores 1,643. The samples above put the tag at the front of a fixed base prompt with seed 1234, so the differences between tags come from the tag alone.
How each model draws grin
Follows composition and expression instructions closely, so the effect shows in a tidy form.
Reacts to the tag more strongly, so its effect is easier to see.
WAI illustrious SDXL v17, a local model. Shows how the same tag reads outside NovelAI.
Writing grin in a prompt
Put the subject first, then this tag, then quality tags.
1girl, solo, grin, best quality, masterpiecewlop, 1girl, grinThe negative prompt and the full settings are on the terms page.
How these samples were made
Every image uses 832×1216, seed 1234, 23 steps and the k_euler_ancestral sampler. The base prompt and negative prompt stay the same for every tag, and only the tag under test changes. Images flagged by the NSFW check are regenerated with a new seed or hidden.
From the Danbooru wiki
A broad smile that exposes teeth.
Do not use the clenched teeth tag with this tag, or teeth if the teeth are not sufficiently detailed as per its wiki.
Examples
h4.See also
FAQ
Does NovelAI recognize grin?
Compare the samples on this page. Every tag on this site shares the same seed and base prompt, so any change you see comes from grin.
How do I write grin in a prompt?
Write "grin" near the front of the prompt and separate it from other tags with commas.
Should I use V5 or V4.5?
V4.5 shows the tag's effect more strongly. V5 gives steadier images with fewer artifacts.